CN112387743A - Method for conveying oil press cake - Google Patents
Method for conveying oil press cake Download PDFInfo
- Publication number
- CN112387743A CN112387743A CN201910766216.1A CN201910766216A CN112387743A CN 112387743 A CN112387743 A CN 112387743A CN 201910766216 A CN201910766216 A CN 201910766216A CN 112387743 A CN112387743 A CN 112387743A
- Authority
- CN
- China
- Prior art keywords
- cake
- air
- conveying
- filter cylinder
- cyclone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 238000000638 solvent extraction Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 3
- 239000004519 grease Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
- B04C2009/004—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with internal filters, in the cyclone chamber or in the vortex finder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
- B04C2009/005—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external rotors, e.g. impeller, ventilator, fan, blower, pump
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Cyclones (AREA)
Abstract
The invention relates to a method for conveying an oil press cake, which comprises the following steps: s1, properly crushing the fresh cake: the method comprises the following steps of (1) properly crushing a fresh pressed cake discharged from a squeezer into small blocks in a cake crusher, and controlling the length and width of the pressed cake to be 7-15 mm; s2, broken cake negative pressure conveying: sucking small blocky cakes crushed by a cake crusher into a cyclone dust filtration unloader by using a material suction pipe, wherein the flow rate of the material suction air is controlled to be 12-21 m/s; s3, carrying out broken cake cyclone unloading: the broken cake tangentially enters the cylindrical cyclone dust filtration unloader in the material conveying pipe, falls into an air-tight discharge valve after cyclone gravity settling separation, is discharged and bagged; the air pump reversely rotates to blow back the filter cylinder, removes the cake ash on the surface of the filter cylinder, stops blowing back after the filter cylinder recovers the normal filtering capacity, and sucks the material by positive suction, and the operation is repeated according to the cycle. The invention can transmit pneumatically without crushing the cake into powder, which is beneficial to solid-liquid separation in the large-scale solvent extraction process of the pressed cake.
Description
Technical Field
The invention relates to a conveying method, in particular to a conveying method of an oil press cake.
Background
The methods for extracting oil from oil mainly include squeezing, water substitution and solvent extraction, and the squeezing method is most widely used. The oil extraction method is a method for extracting oil by extruding oil from oil materials under the action of mechanical external force, and a corresponding device for extruding the oil is called an oil press. During the oil manufacturing process, grease is greatly extruded after oil materials enter an oil press, and simultaneously, large pieces of residue formed by extruding the oil materials are continuously discharged, and the residue is called as pressed cakes. Because of the physical limitations, the grease in the oil cannot be completely squeezed out, and therefore a portion of the grease typically remains in the press cake. Depending on the process requirements, the pressed cake typically has a residual oil content of between 4% and 18%. Generally speaking, the pressed cake with lower residual oil (4-8%) is conveyed to a packing device, weighed and bagged, and then directly used as raw materials of animal feed and the like, and the pressed cake with higher residual oil (9-18%) is conveyed to a solvent extraction section for further extracting residual oil in the cake. It follows that the transport of the pressed cake, no matter how it is subsequently processed, is an indispensable link therein. At present, the conveying method of the pressed cake mainly comprises spiral conveying (auger), scraper conveying and pneumatic conveying. Both screw conveying and scraper conveying have the defects of poor arrangement flexibility, easy clamping and the like of the screw and the scraper. The press cake adopts a pneumatic conveying mode, and has the advantages that the conveying pipeline can be flexibly arranged, the space is saved, the press cake can adapt to various space environments, and the like. However, the traditional pneumatic conveying device for conveying the pressed cakes not only needs to grind large pressed cakes into powder (the diameter is less than or equal to 2mm), which is not beneficial to solid-liquid separation in the large-scale solvent extraction process, but also needs to be matched with a cyclone separator, a blowing-off machine, a bag-type dust collector, an air compressor and the like at the discharge end, so that the discharging process is complicated.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the method for pneumatically conveying the oil press cake, which can reduce the crushing degree of the press cake and improve the flexibility of spatial arrangement.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for constructing a pressed oil cake conveying method comprises the following steps:
s1, properly crushing the fresh cake: the method comprises the following steps of (1) properly crushing a fresh pressed cake discharged from a squeezer into small blocks in a cake crusher, and controlling the length and width of the pressed cake to be 7-15 mm;
s2, broken cake negative pressure conveying: sucking small blocky cakes crushed by a cake crusher into a cyclone dust filtration unloader by using a material suction pipe, wherein the flow rate of the material suction air is controlled to be 12-21 m/s;
s3, carrying out broken cake cyclone unloading: the broken cake tangentially enters the cylindrical cyclone dust filtration unloader in the material conveying pipe, falls into an air-tight discharge valve after cyclone gravity settling separation, is discharged and bagged; the air after preliminary solid-gas separation is sucked into the air pump to be discharged after dust is filtered by the air filter cylinder along the axial direction of the cyclone dust filtering unloader; when the pressure difference between the inside and the outside of the air filter cylinder is higher than 2000-4000 Pa, the air pump reversely rotates to blow back the filter cylinder, dust on the surface of the filter cylinder is removed, the back blowing is stopped after the normal filtering capacity is recovered, the air is sucked in the forward direction to suck the materials, and the circulation is repeated.
Further, the method comprises the following steps: and in the step S1, the thickness of the fresh pressed cake is controlled to be 1-6 mm.
Further, the method comprises the following steps: in the step S2, the pipe diameter of the material suction pipe is controlled to be 40-120 mm.
Further, the method comprises the following steps: in step S3, the air pump is a vortex air pump.
The implementation of the conveying method of the oil press cake has the following beneficial effects: the invention can transmit pneumatically without crushing the cake into powder, which is beneficial to solid-liquid separation in the large-scale solvent extraction process of the pressed cake.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described in detail.
The invention provides a method for conveying an oil press cake, which comprises the following steps:
1) properly crushing the fresh cake: the method comprises the following steps that fresh pressed cakes from a squeezer enter a cake crusher to be properly crushed into small blocks, the length and width of the fresh pressed cakes are controlled to be 7-15 mm, and the thickness of the fresh pressed cakes is controlled to be 1-6 mm; 2) carrying out negative pressure conveying on broken cakes: sucking small blocky cakes crushed by a cake crusher into a cyclone dust filtration unloader by using a material suction pipe, wherein the flow rate of the material suction pipe is controlled to be 12-21 m/s, and the pipe diameter of the material suction pipe is controlled to be 40-120 mm; 3) cyclone unloading of broken cake: the broken cake tangentially enters the cylindrical cyclone dust filtration unloader in the material conveying pipe, falls into an air-tight discharge valve after cyclone gravity settling separation, is discharged and bagged; the air after preliminary solid-gas separation is sucked into the air pump to be discharged after dust is filtered by the air filter cylinder along the axial direction of the cyclone dust filtering unloader; when the pressure difference between the inside and the outside of the air filter cylinder is higher than 2000-4000 Pa, the air pump reversely rotates the back-blowing filter cylinder to remove the cake ash on the surface of the filter cylinder, the back-blowing is stopped after the filter cylinder recovers the normal filtering capacity, the air pump sucks the material in the forward direction and circularly reciprocates according to the process.
Example 1
The invention provides a method for conveying an oil press cake, which comprises the following steps:
1) properly crushing the fresh cake: fresh pressed cake (the thickness of the pressed cake is 1mm) from the squeezer enters a cake crusher (the rotating speed of a rotary hammer is 15 r/min) to be properly crushed into small blocks, and the length and the width of the fresh pressed cake are controlled to be 7 mm;
2) carrying out negative pressure conveying on broken cakes: sucking small cake crushed by a cake crusher into a cyclone dust filtration unloader by using a negative pressure air flow by using a material suction pipe (the pipe diameter is 40mm), wherein the flow rate of the material suction air flow is controlled at 12 m/s;
3) cyclone unloading of broken cake: the broken cake tangentially enters the cylindrical cyclone dust filtration unloader in the material conveying pipe, falls into an air-tight discharge valve after cyclone gravity settling separation, is discharged and bagged; the air after primary solid-gas separation is sucked into an air pump (vortex air pump) along the axial direction of the cyclone dust filtration unloader to be discharged after dust is filtered by an air filter cylinder; when the pressure difference between the inside and the outside of the air filter cylinder is higher than 2000Pa, the air pump reversely rotates the reverse blowing filter cylinder to remove the cake ash on the surface of the filter cylinder, the reverse blowing is stopped after the normal filtering capacity is recovered, and then the air is sucked in the forward direction to suck the materials, and the circulation is repeated.
Example 2
The thickness of the fresh pressed cake is 3 mm; the rotating hammer rotates at 20 r/min; the length and width of the broken small cake are 10 mm; the pipe diameter of the material suction pipe is 70 mm; controlling the flow rate of the suction gas at 18 m/s; when the pressure difference between the inside and the outside of the air filter cylinder is higher than 2500Pa, the air pump rotates reversely to blow back the filter cylinder; the aperture of the material leaking hole is 11 mm; otherwise, the same procedure as in example 1 was repeated.
Example 3
The thickness of the fresh pressed cake is 6 mm; the rotating hammer rotates at 30 r/min; the length and width of the broken small cake are 15 mm; the pipe diameter of the material suction pipe is 120 mm; controlling the flow rate of the suction gas at 21 m/s; the pressure difference between the inside and the outside of the air filter cylinder is higher than 4000Pa, so that the air pump reversely rotates to reversely blow the filter cylinder; the aperture of the material leaking hole is 16 mm; otherwise, the same procedure as in example 1 was repeated.
While embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, which are intended to be illustrative rather than limiting, and many modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. The method for conveying the oil pressed cake is characterized by comprising the following steps of:
s1, properly crushing the fresh cake: the method comprises the following steps of (1) properly crushing a fresh pressed cake discharged from a squeezer into small blocks in a cake crusher, and controlling the length and width of the pressed cake to be 7-15 mm;
s2, broken cake negative pressure conveying: sucking small blocky cakes crushed by a cake crusher into a cyclone dust filtration unloader by using a material suction pipe, wherein the flow rate of the material suction air is controlled to be 12-21 m/s;
s3, carrying out broken cake cyclone unloading: the broken cake tangentially enters the cylindrical cyclone dust filtration unloader in the material conveying pipe, falls into an air-tight discharge valve after cyclone gravity settling separation, is discharged and bagged; the air after preliminary solid-gas separation is sucked into the air pump to be discharged after dust is filtered by the air filter cylinder along the axial direction of the cyclone dust filtering unloader; when the pressure difference between the inside and the outside of the air filter cylinder is higher than 2000-4000 Pa, the air pump reversely rotates to blow back the filter cylinder, dust on the surface of the filter cylinder is removed, the back blowing is stopped after the normal filtering capacity is recovered, the air is sucked in the forward direction to suck the materials, and the circulation is repeated.
2. The method for transporting oil press cake as claimed in claim 1, wherein the thickness of the fresh press cake piece in step S1 is controlled to be 1-6 mm.
3. The method for conveying the oil press cake as claimed in claim 1, wherein the pipe diameter of the suction pipe in the step S2 is controlled to be 40-120 mm.
4. The method for transporting an oil press cake as claimed in claim 1, wherein the air pump in step S3 is a vortex air pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766216.1A CN112387743A (en) | 2019-08-19 | 2019-08-19 | Method for conveying oil press cake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910766216.1A CN112387743A (en) | 2019-08-19 | 2019-08-19 | Method for conveying oil press cake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112387743A true CN112387743A (en) | 2021-02-23 |
Family
ID=74603603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910766216.1A Pending CN112387743A (en) | 2019-08-19 | 2019-08-19 | Method for conveying oil press cake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112387743A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894278A (en) * | 2014-03-28 | 2014-07-02 | 贵州茅台酒股份有限公司 | Yeast crushing equipment and method for preparing yeast powder |
| CN206142457U (en) * | 2016-10-13 | 2017-05-03 | 无限极（营口）有限公司 | Negative pressure cargo airplane for transporting device reaches including this conveyer |
| CN207551398U (en) * | 2017-12-11 | 2018-06-29 | 广东联塑机器制造有限公司 | A kind of material recycling device of pipeline chain conveyor |
-
2019
- 2019-08-19 CN CN201910766216.1A patent/CN112387743A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894278A (en) * | 2014-03-28 | 2014-07-02 | 贵州茅台酒股份有限公司 | Yeast crushing equipment and method for preparing yeast powder |
| CN206142457U (en) * | 2016-10-13 | 2017-05-03 | 无限极（营口）有限公司 | Negative pressure cargo airplane for transporting device reaches including this conveyer |
| CN207551398U (en) * | 2017-12-11 | 2018-06-29 | 广东联塑机器制造有限公司 | A kind of material recycling device of pipeline chain conveyor |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210223 |